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See also data sent to supl.google.com (Android default).
> SUPL is used as part of the A-GPS (Assisted GPS) system to get a faster Time to First Fix. The problem is that Android's implementation automatically sends the IMSI (ID of the SIM card) to the SUPL provider for no apparent reason. And because Google is the default provider it's a big breach of privacy. [1]
[1] https://github.com/Magisk-Modules-Alt-Repo/supl-replacer
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InfluxDB
Purpose built for real-time analytics at any scale. InfluxDB Platform is powered by columnar analytics, optimized for cost-efficient storage, and built with open data standards.
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https://github.com/visgean/where I made this project to trace back where I was based on the exif data in photos.
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I modified an open source GPX recording app called Trackbook to turn it into a 24/7 recorder, and I wrote about it here:
https://voussoir.net/writing/obsessed_with_gpx
I have a few recent commits in my repository that I haven't put into a versioned APK yet though.
The output GPX files can be viewed on the PC with JOSM:
https://josm.openstreetmap.de/